I am worried about data breaches from Bitstamp, so I never gave them my identity (SSN). I got this message:
Dear Steven,
Upon the review of your Bitstamp account we have noticed that you have provided an invalid SSN (Social Security Number).
We kindly ask you to provide a high quality photo of your SSN card, where your valid SSN is clearly visible. You can attach the requested document in a reply to this ticket by using the "Attach a file" button below.
Thank you for your cooperation. Looking forward to your reply.
Disclaimer: The above mentioned Personal Information is requested in accordance with the Currency and Foreign Transactions Reporting Act commonly known as the Bank Secrecy Act (Public Law 91-508) and Foreign Account Tax Compliance Act ("FATCA"). Failure to comply may result in the termination of your Account in accordance with our Terms of Use.
Best regards,
Nejc Srečnik
However, I can still log into my account, and withdraw BTC (and BCH!), which I should probably do someday, even though I don't have very much there.